已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0} (1)已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0}(1)若A∩B={2},求实数a的值;(2)若A∪B=A,求实数a的取值范围

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已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0} (1)已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0}(1)若A∩B={2},求实数a的值;(2)若A∪B=A,求实数a的取值范围
已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0} (1)
已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0}
(1)若A∩B={2},求实数a的值;
(2)若A∪B=A,求实数a的取值范围

已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0} (1)已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0}(1)若A∩B={2},求实数a的值;(2)若A∪B=A,求实数a的取值范围
A∩B={2}
将2代入x2+2(a+1)x+(a2-5)=0中,得到4+4(a+1)+a^2-5=0
(a+1)(a+3)=0
故a=-1或-3
(2)A∪B=A
故B是A的子集
当B为空集时,4(a+1)^2-4(a^2-5)

已知集合A={x|x2-3x+2=0},B={x|x2+2(a+1)x+(a2-5)=0}(1)若A∩B={2},求实数a的值;(2)若A∪B=A,求实数a的取值范围

1553331=1556961556611=154112156456156123